Pfaff 73 User manual

3
________________
CPFAFFD
73
th
1111
INSTRUCTIONS
FOREWORD
Your
dream
has
come
true.
:1
You
are
now
the proud
owner
of
a Pfaff
73,
the
sewing
machine
which
will
enable
you
to
master
all
ordinary
sewing,
--
ornamental
stitching
and
darning
jobs
that
may
come
up
in
a
home.
This
Instruction
book
will
help
you
understand
the
machine
and
give you
valuable
tips
to
make
sewing
more
fun
for
you.
Even
if
you
are
an experienced
seamstress,
you
will
find
this
book
a
valuable
guide
to
easy
sewing.
Follow
these
simple
instructions
and
familiarize
yourself
with
the exclusive
features
of your
machine.
You
will
find
sewing
exciting
on
your
easyto-operate
Pfaff
73.
If
you
have
any
sewing problems,
please
contact
your
Pfaff
dealer.
He
will
be
glad
to
help you
at
any
time.
G.
M.
PFAFF
AG
r
Karlsruhe-Durlach
Branch

I
Face
cover
2
Take-up
lever
3
Thread
retainer
4
Spool
pins
5
Stitch
width
dial
(A)
6
Needle
position
lever
7
BobbIn
winder
8
Balance
wheel
9 Stop
motion
knob
10
Motor
disengaging
mechanism
11
Bobbin
winder
thread retainer
12
Reverse
teed
control
13
Stitch
length
control
14 Free
arm
15
Free
arm
top cover
16
Free
arm
cap
(enclosing
transverse
rotary
hook)
2
17
Sewing foot
10 Sewing toot thumb
screw
19
Light switch
20 Needle
thread
tension
21 Presser
bar
lifter
22
Needle
set
screw
23
Needle
plate
19
9
17
11
12
13
DR62OA

Fundamentals
of Machine
Operation
•
Whenever
you
have
to turn
the balance
wheel,
turn
it
toward
you
(counter-clockwise as
shown
by
black arrow).
Make
sure
the
stop
motion
knob
is
tightened before
you
begin
sewing.
•
Never
run
a
threaded
machine
unless
you have fabric
under
the sew
ing
foot.
•
Place
both
threads
back
under
the
sewing foot
before
you put
fabric
into
the
machine.
•
The
machine
will feed
the material
under
the
sewing foot
automatically.
All
you
have to
do is
guide
the work.
•
Always
bring
the take-up
lever
to
its
highest
position
before
you
begin
and after
you have
completed
a
seam.
Failure
to
observe
this rule
may
cause
the thread
to slip
out
of the
needle
eye.
Also,
it
is easier
to
remove the
work
with
the take-up
lever
up.
DR
050
A
:It
—-H’
3
DR
051

.4
-;
How
to
Operate
Your
Sewing
Machine
Engaging
the Sewing
Mechanism
.4 Hold
balance
wheel
and
turn
stop
motion
knob
clockwise
(as
indicated
by
black
arrow).
Disengaging
the
Sewing
Mechanism
Hold
balance
wheel
and
turn
stop
motion
knob
counter-clockwise
(toward
you).
The
sewing
mechanism
is
disengaged
for bobbin
winding.
The
Workplate
The
workplate
is
used
to
enlarge
the
working
area
for
ordinary sewing.
Before
you
attach the workplate,
raise
the
presser
bar
lifter
and
turn
the
balance
wheel
until
the
take-up
lever
is
at
its
lowest position
(see
arrow
at
right).
.4
Hold
workplate
level
and push
it
between free
arm
and
sewing
foot.
Tilt
it
slightly
so
that
its
lugs
enter
the holes
in
the
machine
base
(see
arrows
in
right
illustration).
,,__..
4-
-
Jr
44
4
—
--
-
_,r
4
-
.
.
.4
Swing
down
the
support
and
press
it
firmly
against
the
base
plate
(see
ill,
at
bottom).
4

OR 510
Electrical
Information
Push
plug
I
into
receptacle
2
and
plug
3
at
other
end
of
cord
into
the
wall
outlet.
Cord
4
leads
to
the foot control
which
serves
to
regulate
the
machine
speed.
Motor
Disengaging
Mechanism
Powerdriven
machines
feature
a
lever
underneath
the
balance
wheel
which
serves
to
swing
the
motor
to
its
operative
position.
To
do
this,
flick
the
lever
down. After
you
have
completed
sewing,
flick
the
lever
to
its
top
position
in
order
to
return
the
motor
to
the
inoperative
position.
With
the
motor
swung
out
of
engagement,
all
machines
set
up on
treadle
stands
can be
driven
by
foot
power.
Foot Contro’
Place
the
foot
control
under
the
table
or
cabinet
within
easy
reach
of
your
foot.
Rest
the
right foot
on
the control
pedal
and
press.
The
harder
you
press,
the
faster
the
machine
will
run.
OR
558
R
7132
5

DR
851
Straight
Stitching
4
For
straight-stitch
sewing
set:
Dial
A
0
Lever
B
=
Center
I
This
setting
is
indicated
on
pages
28—41
as
follow:
A
=
0,
B
=
I
Control
G
regulates
the
stitch length.
For
detailed instructions
please
refer
to
page
18.
To
backtack
the end
of
a
seam,
simply
depress
the
finger-tip
control.
6
DR
009
A

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Removing
the
Bobbin
Case
Raise
needle
to
its
highest
po!nt
and
open free
arm
cap.
Lift
latch
k
with
the
forefinger
of
your
right
hand
and
pull
out
bobbin
case
with
bobbin.
When
you
release
the
latch,
the bobbin
drops
out.
8
DR 614
DR 613

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0
0
0
0
Inserting
a
Full
Bobbin
into
the
Bobbin
Case
As
shown
in
illustration
1,
hold
bobbin
in left
hand
so
that
the
thread
end falls
from
the
top
down
toward
you,
and insert
bobbin
into
bobbin
case.
Hold
the
bobbin
firmly
in the
bobbin
case
and
pull the
thread
into
the
case slot.
Pull
the
thread under the tension
spring
until
it emerges
from
the opening at
the end
of the
spring.
Leave
about
three
inches
of thread
hanging
from
the bobbin
case.
Hold the
case
by
its
open
latch
so
that
the bobbin
cannot
Fall out.
R
5867
R
5869
2
R
5870
3
R
5868
4

Inserting
the
Bobbin
Case
Raise
take-up lever
to
its highest
point and
lift
the latch
with
the thumb
and
forefinger
of
your
right hand.
Turn
bobbin
case
until
slot points
up
(see arrow).
Place
bobbin
case
on
center
stud
s
of hook.
In
replacing the
bobbin
case,
it
is
best
to
hold
the
loose
end
of
thread
so that
it
will
not
get
jammed
between
bobbin
case and
hook.
Release
4
the latch
and
press
against
bobbin
case
until
you
hear
it
snap
into
place.
An
improperly
inserted
bobbin
case
will
cause
needle
breakage.
I
I
I
iij
DR
609
11

Recommended
Needle
and
Thread
Sizes
The
appearance
of
the finished
seam
is
de
pendent
on
the
correct
relationship
between
needle,
thread
and
fabric.
Select
the
proper
thread
sizes
and
needles
from
this chart.
Mercerized
Needle
Types
of Fabrics
Silk
Cotton
Size
Fine
Fabrics
80
to
such
as
georgette,
chiffon,
to
000
or
batiste,
voile,
lawn,
silk.
100
twist
70
Lightweight
Fabrics
70
such
as
dress
silks
and
cottons,
A
& B
to
80
sheer
woolens,
shirting,
dra-
80
twist
peries.
Medium
Fabrics
such
as
lightweight
woolens,
50
8
&
c
madras,
muslin,
brocades,
to
twist
heavy
silks
and rayon, 70
gabardine.
Heavy
Fabrics
40
such
as
coating,
denim,
cor-
c
&
D
duroy,
slipcover
fabrics,
bed
to
100
twist
50
tickings,
lightweight
canvas.
Very
Heavy
Fabrics
such
as
heavy
tickings,
canvas,
24
E
90
overcoating,
sailcloth,
up-
to
twist
to
holstery
40
110
Synthetics,
Rayon,
Acetate
Determined
by
by
including
nylon,
orIon,
dacron,
weight
of
fabric
Thread
size
plastics,
etc.
40
to 50
60 to
80
The
same
size
threads
should
be
used
in
the
needle
and
on
the
bobbin.
Some
experienced
seamstresses
prefer
a
somewhat
thinner
bob
bin
thread.
However,
the
bobbin
thread never
should
be
thicker
than
the
needle
thread.
For
embroidery
and
darning
work,
a
No. 50
thread
should
normally
be
used.
12

Important
Facts about
Needles
[1
On
Pfaff
73
sewing machines,
System 130
R,
flat-shank
needles
are
used
for
all
ordinary
sewing
and
embroidery
work.
Genuine
Pfaff
needles,
System
130
P
are
available
from
every
Pfaff
dealer.
Bent or
blunt
needles
should not
be
used.
Changing
the
Needle
Bring
needle bar
to
its
highest
point
and
lower sewing
foot.
Loosen
needle set
screw
a
half
a
turn
\
and
pull
old
needle
out
of
needle
clamp.
Insert new
needle
into
opening of
needle clamp
and
push
it up
as far as
it will go.
Make
sure
that
the
flat
side
of
the
shank
taces
toward the
back
and
long
groove toward
you.
Tighten
needle
set
screw
a
DR
080
13
4

Upper
Threading
Raise
the
presser
bar
lifter
and
swing
the
spool pins
upto
the
vertical
position. Place
spool
1
on
one
of
the
spool
pins
and
lead
the
thread
behind
both
scrolls
of
thread
retainer
2
(see
ill,
at
top,ofp.
15).
Seize
!he
thin
the
right
and
left
of
the
thread retainer
and
pull
It
toward
you
until
it
snaps
into
he
eyelets.
It
suffices
to
draw
the
thread
into
the
left
eyelet.
Pull
the
thread
between
any
two
of
tension
discs
3
(see
ill,
at bottom
of
p.
15)
and
jerk
it
far to
the
right
so
that
it
slips
properly
into
the slot
and
under
the
thread
check
spring.
As
you
do
this,
press
the
thread
against
the
casting between
spool
and
tension.
Bring
take-up
lever
4
as
high
as
it
will
go
and
pass
the
thread
from
right
to
left
through
the
hole
at
its
end.
Lead
the
thread
down
and
into
slot
5.
Then
thread
the
needle
from
front
to
back.
14
-
--

01
0,
0,

Drawing
Up
the
Bobbin
Thread
Hold
needle
thread
lightly
in
your
left
hand.
Turn
balance
wheel
toward
you
until
the
needle
moves
down
and
up
again.
Lightly
pull
needle
thread
to
draw
bobbin
thread
up
through the
needle
hole.
Place
both
threads
back
under
the
sewing
foot.
Correct
Tension
Regulation
16
II
DR
615
A
Balanced
tensions
are
essential
for sewing.
If your
tension
is
correct,
you
will
have
perfect seams
as
sketched
below
(lii).
Sketch
I
—
The
threads
interlock
on
the
underside
of
the
fabric.
Ca
u
s
e:
Upper
tension
too
loose
or
lower
tension
too
tight.
Sketch
Ii
The
threads
interlock
on
the
surface
of the
fabric.
Ca
u
s
e:
Upper
tension
too tight
or lower
tension
too
loose.
III

Regulating
the
Thread
Tension
DR 580
The
bobbin
thread
tension
has
been
set
for a
medium
grade
at the
factory
and
need
not be
adjusted
for
all
ordinary
sewing
operations.
If
a
special
sewing
operation
should
require
a
looser
or
tighter tension,
turn
the
small
knurled
screw
on
the
bobbin
case
as
follows:
Turn it
left
W\
for looser
tension.
4
Turn
it
right
for tighter tension.
The
thread tension
screw
can
be
turned
with
the
thumb
tip.
Determine
whether
the
bobbin
thread tension
is
set
for
a
medium
grade
J
by
holding
the
thread
end
between
thumb
and
forefinger
and
letting
the
bobbin
case
hang
freely.
The
tension
should
be
strong enough
to
keep
the
bobbin
case
from
being pulled
down
by
its own
weight. However,
as
you
jerk your
hand
slightly,
the
bobbin
case
should gradually
slide
down.
Iv
The
final
stitch
appearance
can be
regulated
by
the
[
4J
upper tension
knob,
as
follows:
Turn
left
‘‘
for
looser
tension.
Turn
right
f4
for
tighter tension.
The
upper
tension
is
so
designed
that
all
grades
of
tension
—
loose
to
tight
—
can be
covered
with
one
complete
turn
of
the
tension
dial.
The
numbers
on
the
tension
dial
indicate
different
degrees
of
tension.
The
higher the
number,
the
greater
the
tension.
Only
in
very
rare
cases
will
it
be
necessary
to
reset
the
tension.
For
ordinary
sewing,
the
upper
tension
should be
set
between
3
and 5.
Your
upper
tension has
athird
tension
disc
for
two-
needle
work.
A
R8029
17

Stitch
Length
Regulation
To
sew
in
reverse,
simply
press
the
finger-tip control
down.
When
the
control
is
released,
the
machine
resumes
forward
sewing.
18
DR 009
DR
008
1.
The
stitch
length
control
serves
to
regulate
the
stitch
length
and
to
limit
it
in
sewing
backwards.
Numbers
0
to
9
on
the
control
indicate
the
stitch length
(the
higher
the
number,
the
longer
the
stitch).
When
the control
is
set
on “0”.
the
machine
ceases
feeding;
the
longest
stitch
is
obtained
by
setting
the
control
on
‘9”
(about
6
stitches
to
the
inch).
To
regulate
the stitch length, turn
the
control
until
the
desired
number
is
fully
visible
at
the
top
of
the slot
(see
arrow).
Reverse
Sewing
This
feature
is
ideal
for backtacking
the
beginning
or
end
of
a
seam
and
for
darning
rips.

Changing
the
Sewing
Foot
Lift
both
needle
and
presser
bars
to
their
highest
positionS
and
turn
sew
ing
foot
thumb
screw b
to
the
left.
Tilt
the foot
sideways
and
pull
it
down.
DR 042
1 jij
I
.
-
1L
Slip
on
new
foot and
tighten
screw
b
securely.
DR
043
19